fhm/Getty Images(NEW YORK) -- The U.S. on Friday began to carry out strikes against Iran-backed militants and Iranian military targets in Iraq and Syria in retaliation for a drone strike on an American base in Jordan last Sunday that killed three U.S. service members.
Dozens of other American troops were wounded in the drone attack on the Tower 22 base near Jordan's border with Iraq and Syria. The U.S. says Iran is responsible for funding and arming the militants while Iran has denied involvement.
President Joe Biden had quickly warned that America would respond forcefully, escalating U.S. involvement in the Middle East after months of trying to contain tensions from boiling over into a broader war in the region.
Here's how the news is developing. All times Eastern.
Feb 03, 4:37 PM US retaliatory strikes begin in Yemen
The next round of retaliatory strikes for the attack in Jordan are ongoing in Yemen at this time, three U.S. officials confirmed to ABC News.
The strikes are in addition to the six anti-ship missiles that were taken out, also in Yemen, earlier in the day.
-ABC News' Nate Luna
Feb 03, 2:37 PM 29 members of Iranian militias killed in strikes on Syria
The Syrian Observatory for Human Rights, a group which reports on war in Syria, confirmed that 29 members of Iranian militias were killed in airstrikes on 28 positions.
Separately, Iraq's Popular Mobilization Forces, a state security force including Iran-backed groups, said that 16 its members were killed including fighters and medics.
Feb 03, 12:10 PM Hezbollah condemns US strikes in Iraq, Syria
In a statement on Saturday, the Hezbollah terrorist organization strongly condemned the U.S.'s strikes on Iraq and Syria and extended its sympathies for the lives lost.
"What the United States of America did is a blatant violation of the sovereignty of the two countries, an attack on their security and territorial integrity, and a shameless violation of all international and humanitarian laws," Hezbollah said.
"This new aggression contributes to destabilizing the region, and creating false justifications and pretexts for the continuation of the American occupation of several regions in Iraq and Syria against the will of their people who yearn for freedom and independence," Hezbollah said.
U.S. officials said Friday that targets were chosen to avoid civilian casualties and because they were connected to enabling the attacks against American service members.
-ABC News' Ghazi Balkiz and Aras Maman
Feb 03, 12:05 PM Jordan denies involvement in US strikes in Iraq
A Jordanian military source told the state-owned Al-Mamlaka TV that Jordan was not involved in U.S. strikes on Iraqi soil, refuting earlier allegations. However, the Jordanian statement did not mention strikes in Syrian territory.
“There is no truth to press reports regarding the participation of Jordanian aircraft in operations carried out by American aircraft inside Iraq," the source told Al-Mamlaka TV.
"The Jordanian Armed Forces respect the sovereignty of brotherly Iraq," the source said, confirming "the depth of the brotherly relations that unite Jordan with all Arab countries."
-ABC News' Ghazi Balkiz and Aras Maman
Feb 03, 11:06 AM Iraq declares 3 days of public mourning over strike deaths
The Iraqi government declared that it will have three days of public mourning over the civilians and armed forces who were killed in the U.S. strikes.
"Today, Saturday, the Prime Minister, Mr. Muhammad Shiaa Al-Sudani, directed the declaration of general mourning in all state departments and institutions, for a period of three days, out of mercy for the souls of the martyrs of our armed forces and the civilians who died as a result of the American bombing on the areas of Akashat and Al-Qaim, west of Anbar Governorate," the Iraqi prime minister's office said in a statement.
-ABC News' Edward Szekeres
Feb 03, 6:39 AM Iraqi Ministry of Foreign Affairs summons US diplomat following strikes
The Iraqi Ministry of Foreign Affairs summoned the Chargé d'Affaires of the United States Embassy in Baghdad, the Iraqi MFA said in an official statement.
"In protest against the American aggression that targeted Iraqi military and civilian sites, the Ministry of Foreign Affairs will summon the Charge d'Affairs of the United States Embassy in Baghdad, Mr. David Perker, due to the absence of the American Ambassador, to hand him an official note of protest regarding the American attack that targeted military and civilian sites in the Akashat and Al-Qaim regions yesterday evening," the MFA statement said.
Feb 03, 6:07 AM U.S. strikes in Iraq killed at least 16 and wounded 25: Iraqi government
U.S. strikes in Iraq killed at least 16 people and wounded 25 others, the Iraqi government confirmed in an official statement.
"The American administration committed a new aggression against the sovereignty of Iraq, as the locations of our security forces, in the Akashat and Al-Qaim regions, as well as neighboring civilian places, were bombed by several American aircraft," said the Iraqi government. "This blatant aggression led to 16 martyrs, including civilians, in addition to 25 wounded. It also caused losses and damage to residential buildings and citizens’ property."
The Iraqi government also said the strikes would "put security in Iraq and the region on the brink of the abyss" and that they directly contradict the United States effort to "establish the required stability" in the region.
Feb 02, 10:22 PM Video of B-1 bomber aircraft taking off to carry out airstrike: CENTCOM
The United States Central Command posted a video Friday evening showing B-1 bomber aircraft taking off from its bases in the U.S. to carry out the airstrikes in Syria and Iraq.
"Iran's Islamic Revolutionary Guards Corps (IRGC) Quds Force and affiliated militia groups continue to represent a direct threat to the stability of Iraq, the region, and the safety of Americans. We will continue to take action, do whatever is necessary to protect our people, and hold those responsible who threaten their safety," Gen. Michael Erik Kurilla, U.S. CENTCOM Commander, said in a statement.
Feb 02, 6:45 PM 'We believe that the strikes were successful': Kirby
The Department of Defense is in the early stages of battle damage assessment "but we believe that the strikes were successful," National Security Council spokesperson John Kirby told reporters in a call Friday.
"The initial indications are that we hit exactly what we meant to hit, with a number of secondary explosions associated with the ammunition and logistics locations," Lt. Gen. Douglas Sims, the director of the Joint Chiefs, said on the call.
Kirby said the strikes took place in the course of 30 minutes and involved over 125 precision-guided munitions. Of the seven total strike locations, three were in Iraq and four were in Syria, according to Sims.
Targeted facilities included command and control centers, intelligence centers, rocket missile and drone storage facilities, and logistics ammunition supply chain facilities, Kirby said.
Kirby noted the targets were chosen to avoid civilian casualties and because they were connected to enabling the attacks against the U.S. service members.
The administration does not know at this time if or how many militants may have been killed or wounded.
Officials would not tell ABC News Chief White House Correspondent Mary Bruce definitively whether there will be more strikes Friday night but said all U.S. aircraft were out of harm's way.
Kirby said the strikes are expected to continue in the "coming days."
-ABC News' Fritz Farrow, Sarah Kolinovsky and Molly Nagle
Feb 02, 5:55 PM Iraqi border area with Syria being targeted: Iraqi military
The city of Al-Qa'im on the Iraqi border with Syria as well as other areas along the Iraqi border with Syria "are being subjected to air strikes by United States aircraft," the spokesperson for the commander-in-chief of the Iraqi Armed Forces said in a statement.